﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace LinqToWindowsForms
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            // find any buttons that are within GroupBoxes
            var buttons = this.Descendants<Button>()
                                .Where(i => i.Ancestors<GroupBox>().Any());

            // find all visible textboxes
            var textBox = this.Descendants<TextBox>()
                              .Cast<TextBox>()
                              .Where(t => t.Visible);
        }
    }
}
